1/* $NetBSD: bcopyinout.S,v 1.11 2003/10/13 21:22:40 scw Exp $ */ 2 3/*- 4 * Copyright (c) 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Allen Briggs for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 39#include "assym.inc" 40 41#include <machine/asm.h> 42#include <sys/errno.h> 43 44__FBSDID("$FreeBSD$"); 45#include <arm/arm/bcopyinout_xscale.S> 46 47/* 48 * int badaddr_read_1(const uint8_t *src, uint8_t *dest) 49 * 50 * Copies a single 8-bit value from src to dest, returning 0 on success, 51 * else EFAULT if a page fault occurred. 52 */ 53ENTRY(badaddr_read_1) 54 GET_PCB(r2) 55 ldr r2, [r2] 56 57 ldr ip, [r2, #PCB_ONFAULT] 58 adr r3, 1f 59 str r3, [r2, #PCB_ONFAULT] 60 nop 61 nop 62 nop 63 ldrb r3, [r0] 64 nop 65 nop 66 nop 67 strb r3, [r1] 68 mov r0, #0 /* No fault */ 691: str ip, [r2, #PCB_ONFAULT] 70 RET 71END(badaddr_read_1) 72 73/* 74 * int badaddr_read_2(const uint16_t *src, uint16_t *dest) 75 * 76 * Copies a single 16-bit value from src to dest, returning 0 on success, 77 * else EFAULT if a page fault occurred. 78 */ 79ENTRY(badaddr_read_2) 80 GET_PCB(r2) 81 ldr r2, [r2] 82 83 ldr ip, [r2, #PCB_ONFAULT] 84 adr r3, 1f 85 str r3, [r2, #PCB_ONFAULT] 86 nop 87 nop 88 nop 89 ldrh r3, [r0] 90 nop 91 nop 92 nop 93 strh r3, [r1] 94 mov r0, #0 /* No fault */ 951: str ip, [r2, #PCB_ONFAULT] 96 RET 97END(badaddr_read_2) 98 99/* 100 * int badaddr_read_4(const uint32_t *src, uint32_t *dest) 101 * 102 * Copies a single 32-bit value from src to dest, returning 0 on success, 103 * else EFAULT if a page fault occurred. 104 */ 105ENTRY(badaddr_read_4) 106 GET_PCB(r2) 107 ldr r2, [r2] 108 109 ldr ip, [r2, #PCB_ONFAULT] 110 adr r3, 1f 111 str r3, [r2, #PCB_ONFAULT] 112 nop 113 nop 114 nop 115 ldr r3, [r0] 116 nop 117 nop 118 nop 119 str r3, [r1] 120 mov r0, #0 /* No fault */ 1211: str ip, [r2, #PCB_ONFAULT] 122 RET 123END(badaddr_read_4) 124 125